Detailed Design (86 unique lessons found)

Cat's eye retro-reflectors extend the range of lane detection when using automated vehicle camera technology at night, especially in inclement weather.
A presentation on automated vehicle camera technology and performance considerations for Advanced Driver Assist Systems (ADAS) applications.

Consider road geometry carefully before implementing part-time shoulder use lanes.
PTSU's effects are strongest along congested segments of road, but can be severely impacted by placement and positioning of ramps or merging lanes.

To minimize emissions, adhere to high performance design specifications.
The report, performed by the Connecticut Academy of Science and Engineering, identified key modernization techniques to minimize the overall carbon footprints of the agency's rolling stock and facilities.

RSU triangulation techniques and inertial GPS solutions can improve geolocation accuracy for connected vehicles operating in dense urban environments.
New York City CV Pilot considered location correction solutions to address GPS positioning challenges associated with the cities "urban canyons"

Provide trip itineraries in personalized traveler information platforms based around cost, time, and user preferences to influence travelers to change their behaviors.
The Trip Itinerary Optimization platform was developed to optimize trip itineraries in accordance with realistic daily constraints and unique circumstances of individual travelers.

Tune traffic density and speed parameters within connected vehicle (CV) applications to balance proper alerts versus false alarms in dense urban environments.
U.S. Department of Transportation Free Public Webinar Series on the Connected Vehicle Pilot Sites System Design Process.

Perform early real-world testing of connected vehicle technology with actual infrastructure in place to verify end-to-end system/application performance
U.S. Department of Transportation Free Public Webinar Series on the Connected Vehicle Pilot Sites System Design Process

Use current SAE, IEEE, and NTCIP standards with systems engineering content to control architecture and design activities for a connected vehicle network.
Experiences from the Wyoming Department of Transportation's (WYDOT) Connected Vehicle Pilot Deployment System Design Phase.

Industry Experts Offer Recommendations for Enterprise-wide Security Controls for the Connected Vehicle Environment.
Report provides a series of lessons learned for developing security systems around Connected Vehicles.

Validate the performance of dedicated short-range communication (DSRC) radios for cooperative adaptive cruise control (CACC) applications by testing receiver signal strength, signal delay, and packet error rates.
USDOT developed an evaluation framework to validate the performance of vehicle-to-vehicle communications for cooperative adaptive cruise control (CACC) systems.

Integrate stop and caution warning signage into heads-up displays to help older drivers brake sooner for potential hazards.
Older drivers are over-represented in urban crashes, a German study found that in-vehicle driver warning systems could help with this problem.

Include pedestrian collision warnings on in-vehicle heads-up displays to reduce reaction time, maximum deceleration, and, in some cases, stopping distance and braking time.
Study performed with sixteen drivers with actual pedestrians in a parking lot environment evaluated a display showing the word “BRAKE” and a virtual shadow that changes size as the vehicle gets closers to the pedestrian.

Use a Weather Responsive Traveler Information system to improve the real-time traffic management capabilities of operations staff during winter weather events by displaying more weather-related messages with a slightly faster advanced notification time.
Experiences from the development, implementation, and evaluation of the Michigan Department of Transportation (MDOT) Weather Responsive Traveler Information (Wx-TINFO) system.

Use a local SQL Lite database with positional data to improve the performance of GIS applications
Evaluation of the Wyoming DOT's Road Condition Reporting Application

Design blind spot warning systems to minimize false alarms.
Promising technologies for commercial motor vehicles (CMVs) in North Carolina.

Plan to recalibrate traffic sensors to accommodate lane shifts and other changes near work zones.
Experience using multi-jurisdictional ITS to support freeway work zone operations.

Plan adequate time to calibrate Bluetooth readers to maximize accuracy and reliability.
Experience using Bluetooth to support traffic mobility monitoring in Salt Lake City.

Avoid unnecessarily restrictive requirements and ambiguous terms in bid documents.
Experience implementing real-time travel time information systems on I-35 in Minnesota.

Implement location-based filtering to modify threat assessments or alerts where drivers choose not to respond to repeated in-vehicle warnings.
Experience from Integrated Vehicle-Based Safety Systems (IVBSS) program field operational tests.

Develop a Freight Transportation Data Architecture to Optimize Freight Transport .
The Transportation Research Board National Cooperative Freight Research Program assessed the benefits in developing a Freight Transportation Data Architecture.

Conduct bench testing prior to field installation of transit signal priority (TSP) equipment to verify functionality between detectors, signal controllers, phase selectors, and cabinet design.
Pilot deployment of transit signal priority in Chicago identified multiple considerations that may help inform future deployments.

Ensure electronic toll collection systems are interoperable with neighboring toll facilities.
The Washington State Department of Transportation’s experience with planning for tolling implementation.

Draw on the strengths of complementary relationships between the public and private sectors for successful implementation of ITS projects.
The E-470 Public Highway Authority’s experience in forging public-private partnerships for design, construction, operations, and maintenance of an electronic toll highway facility.

Build a strong partnership between transportation and public safety agencies, and establish clear operational rules from the start.
An experience operating a CAD-TMC (Computer-Aided Dispatch - Traffic Management Center) in Washington State.

Be aware of technology and training issues when pioneering new transit technologies.
Experience from the Lake Tahoe Coordinated Transit System.

Anticipate, understand, address and manage the risks associated with fare card technologies and the vendor relationship.
Experience of seven partner public transportation agencies in the Central Puget Sound region of Washington in setting up a regional fare card program.

Exercise careful planning in preparation for issuing an RFP to help mitigate cost, schedule, and performance risks.
The Riverside Transit Agency experience with the methods of award and terms and conditions used to procure equipment and software for automatic vehicle location (AVL) and computer-aided dispatch (CAD).

Categorize each project by level of complexity and risk to determine the most appropriate ITS procurement package.
Experience from a review of ITS contracting methods and practices. Step 3 of the Decision Model.

Engage in project planning and make initial decisions about the ITS procurement process.
Experience from a review of ITS contracting methods and practices. Step 1 of the Decision Model.

Consider requirements definition and system design Issues for Archived Data Management Systems.
Experience from six Archived Data Management Systems case studies.

Involve and collaborate with a broad range of users during software design, development, testing, and deployment to increase the return on investment.
New Mexico Department of Transportation's experience in designing and deploying a web-based software application to simplify the increasing complexity of coordinating rural transit funding.

Consider that integration with existing ITS technologies and the vendor selection process can impact project implementation schedules and costs.
Washington's experience in deploying five Advanced Traveler Information System (ATIS) projects and developing a standardized approach for evaluating ATIS projects.

Implement ATIS technology in a way that supports the maintenance staff.
Washington's experience in deploying five Advanced Traveler Information System (ATIS) projects and developing a standardized approach for evaluating ATIS projects.

Implement standardized procedures for sharing, accessing and storing transportation data across the enterprise.
Five transit systems' experiences with geographic data systems technology investment.

Include significant planning and development time in the overall project schedule to accommodate identifying and addressing the various compatibility issues, to integrate existing legacy system equipment across multiple agencies.
Orlando, Florida's experience with a Field Operational Test (FOT) on using a single smart card for transportation payments at facilities operated by multiple regional agencies.

Consider using real time traffic control system to overcome mobility and safety obstacles in a work zone.
An Illinois Department of Transportation experience using ITS in work zones.

Use ITS to implement a reliable communications system in work zones.
New Mexico’s experience in planning, deploying and operating a work zone traffic and incident management system.

Investigate procurement alternatives of leasing, buying, or building equipment to minimize operations and maintenance costs.
Montana Department of Transportation's experience in procuring hardware and software for the statewide 511 traveler information system.

Use an interoperable transponder to assure maximum benefits to both the private and public sector.
The Washington State and British Columbia experience in using transponders as part of the IMTC ITS CVO – Border Crossing Deployment.

Improve management and operational procedures during a natural disaster by extending and supporting communication systems and networks.
A Texas Department of Transportation (TxDOT) experience with Tropical Storm Allison's effect on the Houston Metropolitan Transportation system.

Standardize the system environment.
Utah DOT’s experience using configuration management.

Design the system to withstand the demands of the physical environment in which it will be deployed.
Virginia's experience implementing a pilot automatic vehicle location (AVL) system in an urban winter maintenance operations setting.

Consider the risk that draft ITS standards will not remain stable through further development when deciding whether to use them in an ITS deployment.
Hampton Roads, Virginia's experience with immature data-exchange standards for its Advanced Traveler Information System

Use ITS Standards to achieve interchangeability and interoperability for Dynamic Message Signs.
Experience of nine agencies using Dynamic Message Signs built to NTCIP specifications.

Use non-proprietary software for ITS projects to ensure compatibility with other ITS components
Experience with the ITS integration effort in the Metropolitan Model Deployment Initiative (MMDI)

Ensure that qualified staff with expertise in telecommunications is involved, as planning for and designing a telecommunications network is complicated.
Experiences from the Departments of Transportation (DOTS) of multiple states in selecting telecommunications options.

Anticipate challenges with the ITS technology being tested, including problems with software modification and adaptation of previously developed technology.
A Washington State Department of Transportation’s experience with testing of new variable speed limit technology to reduce winter accidents on a mountain pass.

Select appropriate technologies to enable emergency notification and response systems to complement traditional 9-1-1 service.
Colorado and Washington’s experience with emergency notification and response systems.

Consider cost-saving strategies and long term needs when making communications investments.
National experience with making communications investments for incident management.

Improve demand response transit using ITS technology, including CAD/AVL, with Mobile Data Terminals (MDT), electronic ID cards, and Geographic Information Systems (GIS).
Different paratransit agency experiences with CAD/AVL, Mobile Data Terminals, electronic ID cards and GIS, all to accomplish improved operational goals, is outlined.